ParticleSystem image - test.cpp

#include "testApp.h"

//--------------------------------------------------------------
void testApp::setup(){
    // 画面基本設定
    ofSetFrameRate(60);
    ofBackground(63);
    ofEnableBlendMode(OF_BLENDMODE_ADD);
    
    // パーティクル画像読込み
    particleImage.loadImage("particle32.png");
}

//--------------------------------------------------------------
void testApp::update(){
    for(int i = 0; i < particle.size(); i++){
        particle[i].resetForce();
        particle[i].updateForce();
        particle[i].updatePos();
    }
}

//--------------------------------------------------------------
void testApp::draw(){
    // 設定した場所に円を描く
    ofSetHexColor(0xffffff);
    for(int i = 0; i < particle.size(); i++){
        //particle[i].draw();
        ofPoint pos = ofPoint(particle[i].position.x, particle[i].position.y);
        particleImage.draw(pos.x-16, pos.y-16, 32, 32);
    }
    
    ofDrawBitmapString("particle num = " + ofToString(particle.size()), 10, 15);
    ofDrawBitmapString("fps = " + ofToString(ofGetFrameRate()), 10, 30);
}

//--------------------------------------------------------------
void testApp::keyPressed(int key){
    if (key == 'f') {
        ofToggleFullscreen();
    }
    if (key == 'c') {
        particle.clear();
    }
}

//--------------------------------------------------------------
void testApp::mouseDragged(int x, int y, int button){
    for(int i = 0; i < NUM; i++){
        ofVec2f pos = ofVec2f(x, y);
        float length = ofRandom(1);
        float angle = ofRandom(PI * 2);
        ofVec2f vel = ofVec2f(cos(angle) * length, sin(angle) * length);
        Particle p;
        p.setup(pos, vel);
        p.radius = 2;
        p.friction = 0.002;
        particle.push_back(p);
    }
}

ParticleSystem image - test.h

#pragma once

#include "ofMain.h"
#include "Particle.h"

class testApp : public ofBaseApp{
    
public:
    void setup();
    void update();
    void draw();
    
    void keyPressed(int key);
    void keyReleased(int key);
    void mouseMoved(int x, int y );
    void mouseDragged(int x, int y, int button);
    void mousePressed(int x, int y, int button);
    void mouseReleased(int x, int y, int button);
    void windowResized(int w, int h);
    void dragEvent(ofDragInfo dragInfo);
    void gotMessage(ofMessage msg);
    
    vector<Particle> particle;
    ofImage particleImage;
    static const int NUM = 5;
};